• A torsion bar   can be used on a vehicle ,absorbs road bumps , cushioning passenger travel. Torsion bar suspensions are used in many modern cars and trucks..

• In many vehicle suspension systems  torsion springs are used.

• Can be used in the torsion pendulum. 

• They had been used in ancient weapons or some modern toys.

• The balance springs or hair springs are used in mechanical watches 

• Torsion balance springs are used in mechanical pointer-type meters 

• Tiny torsion springs can be used in electric , like DMD or digital micromirror device chips. 

The Industries that Use Torsion Springs

Major original equipment manufacturers (OEMs) that produce products for various industries use compression springs in many of their products. 

• Industrial production lines

• Transportation vechiles

• Construction facilities

• Materials handling

• Agriculture machines

• Petrochemical

• Aeronautical